I am new on here so be nice! I am building a concrete base for a summer house. I don't want/can't afford the expense of having ready mixed concrete delivered plus would need to hire a pump as its down the other end of the garden! So my question is, how do I work out how many bags of sand and cement I need?
Measurements are 4.5m x 4.5m. Going for 3 inch deep hardcore and 3 inch deep of concrete. I thought it was a 1:5 ratio? I was ready about a C20 mix, would this be better??
this is my first job in a garden, more at home doing interiors! So any help is appreciated.
you will need 2 ton bags of concrete mix and 10 cement, that's at 100mm thick. also lay a sheet of reinforcing mesh in the concrete Its best to buy some 100mm x 25 timber and shutter the area to the size you want, level the timber and fix it to 50 x 25mm stakes nailed in the ground. There are hire mix companies that will mix and barrow the concrete to where you want so will save you mixing it yourself, but you will need to lay it